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Dot (diacritic)




When used as a Diacritic mark, the term dot is usually reserved for the '' Middle Dot '' (·), or to the Glyph s 'combining dot above' ( ) and 'combining dot below' ( ) which may be combined with some Letter s of the extended Latin Alphabet s in use in Eastern European languages and Vietnamese .

Example characters: ċ/Ċ from Maltese and Irish Gaelic (old orthography), ė/Ė from Lithuanian , ġ/Ġ from Maltese and Irish Gaelic (old orthography), ż/Ż from Polish , etc. In Irish Gaelic the dot is called a sí buailte.


USAGE

In Vietnamese, the nặng (low, glottal) tone is repesented with a dot below the base vowel: ạ ặ ậ ẹ ệ ị ọ ộ ợ ụ ự ỵ.
The dot above the lowercase i and j (and uppercase İ in Turkish ) is not seen as a dot, but rather as part of the character, and the double dots above several Latin letters such as ä, ë etc. are not dots either, but are Umlaut s or Diaereses .

In romanizations of Semitic Languages , a dot below a consonant is used to indicate the " Emphatic version" of that consonant. E.g. represents emphatic s.
In Arabic Romanization in particular, is for Ghayin .

In IAST and National Library At Calcutta Romanization , transcribing Indic Languages , a dot below a letter indicates Retroflex Consonant s.
while an underdot signifies Emphatic Consonants .

In Yoruba , the dot is used below the o, the e and the s: those three letters can also occur without dot as another letter.

In Mathematics and Physics the dot denotes the Time Derivative as in v=\dot{x}.


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